Micrometer-regulator for watches



' (NoModeL) G. E. MASON.

MIGROMETEB, REGULATOR FOR WATCHES.

No. 288,086. Patented Nov. 6, 1888.

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UNITED STATES PATENT OFFICE.

CHARLES E. MASON, OF COLUMBUS, OHIO.

MlCROMETER-REGULATOR FOR WATCHES.

SPECIFICATION forming part of Letters Patent No. 288,086, dated November6, 1883.

Application tiled July 17, 1883. (No model.)

To all whom it may concern Be it known that I, CHAS. E. Mason, acitizenof the United States, residing at Columbus, in the county of Franklinand State of Ohio,

have invented certain new and useful Improvements inMicrometic-Regulator Attachments for Vatches, and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and toletters orfigures of reference marked thereon, which form a partof this specification.

I 5 Figure 1 of the drawingsis arepresentation of this invention, and isa top view. Fig. 2is a vertical section taken in the direction of theshaft. Fig. 3 is a vertical section taken through the regulator-arm andacross the shaft and worm.

My invention has relation to micrometricregulator attachments forwatches; and it consists in the construction and novel arrangement ofdevices, as hereinafter set forth, and

pointed out in the appended claim.

In the accompanying drawings, the letterA designates the regulator-arm,which is provided with alug or pivoted proj ection, I), adapted toengage an annular groove, 0, formed around the middle portion of ashortworm, B. Through the axial part of the wormB is made a bearing, (1,which engages the turning shaft E in such a manner that while the wormis confined to the shaft so as to turn therewith it is allowedafreesliding movement onthe shaft. 3 5 111 the construction illustratedthe shaft is made square, except at its journals 5, and is provided withahead. h, having a key-seat, y.

K designates a screw-threaded rack, which is formed upon or secured tothe plate F, and extends transversely with reference to theregulator-arm A. This rack is engaged by the worm B. Rotary motionhaving been communicated to the shaft E or worm B, the latter is causedto traverse the rack K toward one 5 end or the other thereof, accordingto the direction of rotary motion. As the worm progrosses, theregulatorarm, which engages the groove thereof, is correspondinglymoved.

Having described this invention, what I claim, and desire to secure byLetters Patent,

The combination,with a regulator-arm having a pivoted projection, and aworm having an annular groove engaging said projection, 55 and an axialbearing adapted to engage a shaft and to have a sliding motion thereon,of a transverse screw-threaded rack engaging said worm, substantially asspecified.

CHAS. E. MASON.

Vitnesses:

P. H. WVHEELER, LE0 AELEY.

